The late Elmer Keith designed a stem that went forward from the primer pocket in rifle cartridges, to ignite the charge near the front. His thought was that it would be more efficient and allow more energy from a given charge of powder. I know he did this with the 35 Whelen cartridge. I believe his experiments were during or just Before WWII He was working in one of the army armeries. and brought it up to the engineers to improve howitzer rounds. he was laughed at. Shortly there after an engeneer in that Armory had this great idea of extending the flash hole forward via a tube to better ignite the charge in Howitzer rounds and also for the big navel guns. Elmer was screwed out of his Idea, and invention.

The power stem isn't a new Idea, I believe it is a very good Idea, and it does work.